/**
 * Configuration service for Sitefinity Assistant widget
 * Provides access to environment variables and configuration settings
 */
export declare class SitefinityAssistantConfig {
    /**
     * Gets the CDN hostname for Sitefinity Assistant resources
     * @throws Error if SF_ASSISTANT_CDN_HOSTNAME environment variable is not configured
     */
    static getCdnHostname(): string;
    /**
     * Generates a full CDN URL for a given filename
     * @param filename The filename to generate URL for
     * @param version Optional version parameter
     * @throws Error if SF_ASSISTANT_CDN_HOSTNAME is not configured
     */
    static getCdnUrl(filename: string, version?: string): string;
    /**
     * Gets the chat service endpoint URL
     */
    static getChatServiceUrl(assistantType: string | null): string;
}